Improvement in gas-compensatojis



A. SMITH.

Gas Compensator.

.Patented Sept'. 22, 1863.

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N. PETERS, Prmurhognpnm wuhinmon, D. C4

UNITED STATES PATENT OFFICE.

ADDISON SMITH, OF YORK, N. Y., ASSIGNOR TO HIMSELF AND JAMES M. SAYRE, OF SAME PLACE.

IMPROVEMENT IN GAS-COMPENSATOBS.

Specification forming part of Letters Patent No. 40,085, dated September 22, 1863.

To @ZZ whom it may concern.-

Be it known that I, ADDISON SMITH, of' the cit-y. county, and State of N ew York, have invented certain new and useful improvements in the apparatus known as a Gas-Compensator,7 to regulate the pressure of gas while being drawn from the retort by exhausters; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, figures, and letti-rs of refer ence thereon, Inaking part of this specification.

Of the said drawings, Figure 1 represents a front elevation, and Fig. 2 a vertical section.

Similar letters of reference indicate like parts in all the drawings.

Myinvention is designed as an improvement u; on the invention patented by Philip W. Mackenzie, ot' Jersey City, New Jersey,

A March 4,1862, which patent was duly assigned to me by said Mackenzie.

In M ackenzies compensator the corrugated metal plates,.at`ter being a short time in use, crack and break from the contraction and eX pansion of the metal or other causes, and thereby the efficiency of the invention is greatly impaired.

My invention is designed to obviate this diculty; and it consists, Iirst, in a combining with a cylinder (secured between gas-pipes) provided with posts and a valve mechanism an inverted dish and a tluidjoint for operating the valves and regulating the pressure of the gas, as will be more fully set forth hereinafter.

The second part ot' my invention consists in the combination, with an inverted dish and uidjoint, of a double rotary valve, whereby a small movement of the inverted dish and its connections causes the valve to giveincreased communication between the pipes, as will be fully set forth.

To enable others skilled in the art to make and use my invention, I will describe the construction and operation thereof.

A A represent the main pipes leading from the retorts, and between which the gasexhauster is placed. B Bl are pipes leading from the pipes A and A and connecting with the valveeyliuder C. On this cylinder is secured a vertical column, D, to the upper part of which is secured a disk or cylinder, F, provided with an inner cylinder, which forms a channel for the Huid-joint, as plainly shown in Fig. 2. i

In the column D there is a box, f, for the lower end of the vertical rod G, and also another box, e, which keeps the rod in position and allows it to slide freely. This rod G has a serewtl1read cut thereon, upon which is placed a nut, 6, at the lowest point.

The inverted dish H is then placed upon the spindle G with a packed joint and clamped in position by the nuts 5 and 6. A bar, c, (to the ends of which are attached the valve-rods ct,) is then secured upon the spindle G by the nuts 3 and 4, and the arched spring d is adjusted by the nuts l and 2. The ends of the arched spring are slotted and rest upon the earsjj, and are kept in place by pinsz' t', inserted in the ears, fitting the slots. The channel J is Illed, as indicated in the color Fig. 2, to make a sealed joint. Any fluid may be used, but I prefer and use quicksilverk as the best, as it does not evaporate or become stale.

The cylinder Gis provided with a rotary double valve, E, secured upon la rod, I, which is packed in the cylinder-heads sufficiently tight not to emit gas. Secured to this rod outside the cylinder-head is an index-hand, h, and the arms b b, (one on each end of the cylinder,) to which connectingrods a pass to the lever c and are secured and adjusted by nuts.

Operation The operation will be as follows: In Fig. 2 the communication between the pipes A B, cylinder-posts, and column D, and inverted cup H is open and unobstructed, while on the other side of the pipes are closed.

The valve mechanism is adjusted so that thevalve stands in the position shown in Fig. 2, and the index-pointer stands at o. The gas is drawn from the retorts through the passages A A by the exhaustcr, which is located between the pipes, but not shown,) as indicated by the arrows. If the exhauster is at any time driven too fast, reducing the pressure on the retorts below the desired point, the cup His depressed by the decreased pressure in the cup and the valve thrust open, allowing the gas to pass through the ports g g, as indicated by the arrows in the pipes B and B', to supply the amount demanded by and due to the increased speed of the exhauster.

By means of the nuts on the screw G and the slotted arms b, the valve is adjusted on the verge of the post g, so that the least depression of the inverted cup H Will operate the valve E, and thus regulate automatically the pressure of gas and prevent the formation of a vacuum. The great advantage of a double valve is that a small amount of motion of the inverted cup gives a greatly-increased communication between the pipes and admits a greater amount of gas to pass from one pipe to the other, and more quickly and evenly regulates the pressure.

I claiml. Combining With acylinder provided with posts and a valve mechanism, substantially 

